Objective: To describe the pharmacokinetic (PK) profile of sarilumab in patients aged 1-17 years with Systemic Juvenile Idiopathic Arthritis (sJIA) in order to identify the dose and regimen for adequate treatment of this population. Secondary Objective: To describe the pharmacodynamics (PD) profile, the efficacy, and the long term safety of sarilumab in patients with sJIA.

Summary: The reason for this study is to see if the study drug baricitinib is safe and effective in the treatment of JIA in participants ages 1 to 17. This study is for participants that have been enrolled in studies I4V-MC-JAHV (NCT03773978) or I4V-MC-JAHU.

Summary: The reason for this study is to see if the study drug baricitinib is safe and effective in participants from 1 year to less than 18 years old with systemic juvenile idiopathic arthritis (sJIA).

Summary: The main purpose of the study is to evaluate the safety and tolerability of AEVI-007 in participants with Adult Onset Still's Disease (AOSD).

Summary: This is a study to evaluate pharmacokinetics, safety and tolerability of upadacitinib in pediatric participants with polyarticular course juvenile idiopathic arthritis. This study consists of three parts: Part 1 is multiple-cohort study that consists of two sequential multiple dose groups. Participants benefiting from the study drug with no ongoing adverse events of special interest or serious adv...

Background: Inflammatory conditions can cause symptoms like fevers, arthritis, and rash. Systemic juvenile idiopathic arthritis (sJIA) is one of these conditions. So is adult-onset Still s disease (AOSD). Their causes are unknown. Researchers want to learn more about these conditions. This includes genetic changes and environmental factors.

Summary: Evaluate long-term safety and tolerability of tofacitinib in patients with JIA, who have previously participated in tofacitinib JIA studies.

Summary: The study will aim to estimate the efficacy of apremilast compared with placebo in the treatment of juvenile psoriatic arthritis (JPsA) in pediatric participants 5 to less than 18 years of age.

Summary: The reason for this study is to see if the study drug ixekizumab is safe and effective in children with juvenile idiopathic arthritis (JIA) categories of enthesitis-related arthritis (ERA) (including juvenile onset ankylosing spondylitis [JoAS]) and juvenile psoriatic arthritis (JPsA).

Summary: The purpose of the study is to evaluate pharmacokinetics (PK) of ustekinumab in juvenile psoriatic arthritis (jPsA) and pediatric psoriasis (PsO).

Summary: The purpose of this study is to evaluate the pharmacokinetics (PK) and efficacy of ustekinumab and guselkumab in juvenile psoriatic arthritis (jPsA).

Summary: The overarching goal of this study is the development of a physiologic endpoint of pain and treatment effect in three distinct rheumatology populations. This would enable objective assessment of pain and treatment in these populations and enable a much more precise approach to treatment. Such an endpoint stands to significantly improve outcomes in these patients by eliminating the need for a trial...